University of Cambridge > Talks.cam > DAMTP Friday GR Seminar > Higher derivative with constraints: exorcising Ostrogradski's ghost.

Higher derivative with constraints: exorcising Ostrogradski's ghost.

Add to your list(s) Download to your calendar using vCal

If you have a question about this talk, please contact Dr Joan Camps.

Higher derivative theory, if non-degenerate, is known to be accompanied with Ostrogradski’s instability. The only way anyone has ever found to avoid it is by constraints. The first part of my talk will be a pedagogical review of Ostrogradski’s instability and Dirac’s analysis of constrained systems. After that I will present how to introduce suitable constraints which selectively remove the unstable degrees of freedom and render Hamiltonian bounded from below. Finally I will discuss how to apply this technique to higher derivative gravity.

This talk is part of the DAMTP Friday GR Seminar series.

Tell a friend about this talk:

This talk is included in these lists:

Note that ex-directory lists are not shown.

 

© 2006-2019 Talks.cam, University of Cambridge. Contact Us | Help and Documentation | Privacy and Publicity